Depending on your Android version, you have to either swipe inward from the left or from the right edge, or reveal the hidden system navigation bar and then hit "back".

Here's how to swipe inward from the left:

Here's how to swipe inward from the right:

Here's how to use the bottom navigation bar:

Just try what's working on your tablet.

Press Cmd+D, or select View > Back to Dashboard in the menu bar.

Here's how to Cmd+D back to dashboard:

Here's how to View > Back to Dashboard in the menu bar:

Swipe right from the left screen edge.

Click the window icon at the top-left, or right-click the title bar, then choose Back to Dashboard.

Here's how to right click the title bar and go back to dashboard:

Here's how to use the window icon at the top left:

Skins run in an external browser, not an embedded WebView. Switch back to the Decaid application window.